Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and

WonderPen is a writing app for both professional and amateur writers.

GoodTask is a Powerful Task/Project Manager based on Apple's Reminders & Calendars. You can use it as simple checklist to focus or as complex project management tool to get big things done.